中文摘要：

对凹槽通道中的流动和换热问题进行了数值模拟。Nu的数值结果与文献已有的激光全息干涉实验结果基本一致，但某些工况与实验结果差别大约达到了20％-30％。数值计算获得的温度场也与文献已有的激光全息干涉实验结果基本一致。流场的数值结果表明，入口第一个突出块上出现了回流，这可以解释为什么第一个突出块的平均Nu较小。当Re=2632时，在最后一个突出块后出现了涡列，所得到的数值结果是振荡的，表明流动与换热在这个参数下出现了自维持振荡，是非稳态的。

英文摘要：

The flow and heat transfer in a grooved channel were numerically studied. For most cases, both Nusselt number and temperature fields of numerical results agree with the holographic interference results of the reference, and the difference can be 20%-30% for some cases. The flow patterns of numerical results show that there is backflow above the first block near the inlet, which could explain smaller value of the average Nu of the first block. For Re = 2632, a vortex row formed in the downstream of the last block, and the numerical results were oscillating, which shows the flow and heat transfer is self-sustained oscillating and non-steady with the Reynolds number.